Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e6e16afe312711…

MALICIOUS

PDF

141.9 KB Created: 2020-12-18 02:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 19d3cb1b13e74d62a135295588962ba4 SHA-1: 08ce7a6496db4a52a652ace8bb2450b3db2878e7 SHA-256: a9e6e16afe312711a3c2aa49bcd69b3cde9fb7db1d900fe098c63c040dd784c8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/aws?utm_term=manual+bacteriologia+clinica+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4455672/normal_5fa8130d42069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_5fbd1966540cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_5f9b00239f4b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454426/normal_5fcf2c3ae2842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fdbdb0cf0e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f97821de58cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5f8e591be5fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446029/normal_5fc061acb0c83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/pivopepetekupomadojov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001cb4f9-0fff-4d19-b63f-f85644ff514d/xonizuzezefipinowanizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f5a65d-ebb1-4a3d-a200-22f835980d90/fortnite_apk_for_samsung_a10e.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/basketball_clipart_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/spotify_apk_for_windows_10.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE35 5288 bytes
SHA-256: 78112bf0d621d104994f62a6d41a04ba43abcc35cc52295ef7cb6e80dccfc06e
font_01_sfnt_off00020049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20049 13212 bytes
SHA-256: aaa58fd5808c2845f3344d96d802551babb8dc16c51ec0d4aaea9f96e5d59fbb

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